Automatic sewage-ejector.



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PATENTEDAPR. 12, 1904.

APPLICATION FILEDOT. 12, 1903.

3 SHEETS-SHEET 2.

110A MODEL.

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No. 757,169. I v PATENTED APR. 12, 1904. E. YEOMANS.

AUTOMATIC SEWAGE EJEGTOR.

APPLIOATION FILED 00T. 12, 1903. 4 H0 MODEL.

3 SHEETS-SHEET 3.

the city sewers.

UNITED STATES Patented April 12, 1904.

PATENT CFFICE..

AUTOMATIC: sEwAeE-EJECTOR..

i'SPECIFICATION forming part of Letters Patent No. 757,169, dated April 12, 1904.

` Application filed October 12, 190,3. Serial No. 176.634. (No model.)

To all whom it may concern:

-city of Chicago, in the county of Cook and State of Illinois, have ihvented certain new and useful Improvements in Automatic Sewage-Ejectors, of which the following is a full, clear, and exact description. A

This invention, while susceptible of use in other situations, is design ed more particularly for the pumping of sewage from buildings the basements of which are below the level of An example of this type of apparatus is illustrated in Patent No. 735,430, granted to me August 4, 1903.

The object of the present invention is to render the apparatus cheaper, more compact, and more eiiieient; and the invention consists in the features of improvement hereinafter described, illustrated in the accompanying drawings, and more particularly pointed out in the claims at the end of this specification.

Figure l is a View, partially in section and partially in side elevation, of an apparatus embodying my invention. Fig. 2 is a view in vertical section on line 2 2 of Fig. 3. Fig.

3 is a view in'horizontal section on a lineI slightly below the cover of the inclosing casing. Fig. 4 is adetail View in vertical section, showing the valve and stem forclo'sing the port in the top of the liquid tank or reservoir.

In the accompanying drawings the apparatus is shown as setwithin an excavation formed in the basement of a building.y

A designates an inclosing casing, the top of which is ,shown as reaching to the Hoor-line of the basement, `and this casing A may be formed of boiler-plate or other suitable material. The bottom of the easing A rests uponl the annular top plate of the submerged sewage tank or reservoir B, this tank or reservoir .B and its top plate Z2 being preferably formed of cast metal, the top plate b being braced at intervals by webs 7)', extending between the top plate and the outer side wall of the tank B. v The annular top plate b is preferably formed `with countersunk portions b2, in which s ets the edge of the cover Bof the tank. Through this cover B is formed a port c, with which connects the lower end of the inductionpipe C, this lower end of the pipe C being formed with 'an annular base c to afford a firm bearing upon the top of the cover B. With the -T- section C of the pipe C connects the sewage-admission pipe C2, and in the lower part of the section C is formed a valve-seat adapt-- ed to receive a valve C3, by which the admission of sewage to the tank B may be'cut off when desired. The valve Cs is formed wlth .a screw-threaded stem c3, that leads upward through a threaded plate and is furnished with a hand-wheel c, whereby it may be conveniently manipulated. The uppermost section of the induction-'pipe C terminates Iin a anged end beneath the cover A of the tank A, this cover `A being preferably formed of cast metal with its edge resting within a seat a2 formed'in the annular top plate A2 of the casing A. The casing A is preferably connected to the annular top plate A2 by an angle-ring ai, and a similar ring a5 will be employed for connecting the bottom of the casing to the annular top plate o of the tank B.

Through thertop plate By of the tank or reservoir B extends a float-pipe D, that is preferably provided with an annular'iiange cZ,-.

of the casing A. It will thus be seen that the induction-pipe C and float-pipe D serve to support the cover A ofthe casing A and parts mounted thereon.- 'Within the floatpipe Dis placed a' float E, the stem-rod e of which passes upward through a stuffing-box e', formed in the cover A of the tank A.

Preferably the lower end of the :float-pipe D is extended downwardly to a point near the bottom of the tank or reservoir B, the purf pose of' this being to aiford av guide for the loattso that the float shall not be disturbed by the agitation of the 4liquid within the tank or i reservoir.. As shown, the float-stem e has connected to the cross-head at its upper end two cables F andF, that pass around the pulleys fand are provided each with weights F2 and with stops f and f2, adjustably mounted upon the cablesF and F and adapted to con- IOO tact with and shift the arms of the electric l through the cover A and are coupled to the shafts of the centrifugal pumps K and K respectively. From these centrifugal pumps K and K depend, respectively, the pipes and la to points adjacent the bottom of the tank or reservoir B, and each of these pipes 7c and r lis preferably formed with an annular flange k2, that rests upon the cover B of the tank or reservoir B. From the periphery of each of the pumps K and K lead the branch discharge-pipes and v, respectively, these pipes joining in a single discharge-pipe K2, that extends through the cover A of the casing A, whence it will lead by suitable connections to the sewer. The branch dischargepipes ks and are furnished with suitable check-valves within check-valve casings lc and is, these check-valves serving to prevent the backflow of sewage to either ofv the pumps when the lother pump alone is-in operation.

"Above the top of the pumps K and K are mounted suitable brackets k7 and ks, having ybearings In for the shafts it and lz', whereby the pumps are driven.

From the foregoing description the operation of -my improved apparatus will be seen to be as follows: Sewage being delivered by the induction-pipe C into the liquid-tight subjacent tank or reservoir B will rise up into the oat-pipe D, thereby causing the ioat E to be lifted until the stop or ball f of the cable F has shifted the switch G and .ing pump into operation. As the liquid thus rises in the ioatpipe D, and as the centrif` ugal pump K is driven by the motor.H liquid will be withdrawn from the tank or reservoir B and will be discharged through the branch pipe 7c3 and main discharge-pipe K2 to the sewer.V If vthe liquid accumulates within the tank or reservoir B more rapidly than it can be withdrawn by the 4pump K, the float E'will continue to rise within the pipe D until the stop f' on the cable F shifts the electric switch G and brings the motor H and pump K into operation, and when both .pumps are thus in operation liquid will be discharged through both the branch pipes 1 and cand the main discharge-pipe K2. As

the level of the liquid descends in the tank or reservoir B the oat E will correspondlingly fall ,until the stops f2 of the cables F and F shift the electric switches G and Gr' and throw the motors H and H', and conse`.

quently the pumps K and K', out of action.

In the cover B of the tank orreservoir B is formed a port r, that is normally closed by a valve R. The stem of this valve R has a threaded portion that passes through a threaded hole in the bracket R", bolted to the cover B, `and the` upper end of this valve-stem passes up through a hole inV the cover A of the casing A and is fitted Lwith a handwheel r2, whereby the valve may be shifted. In case there should. be any accidental accumulation of'liquid-in the lower part of the cas-ing A it will onlybe necessary to raise the valve R, thereby permitting the liquid to flow down into the tank or reservoir B as it is withdrawn therefrom by the pump or pumps K K.

In order to prevent the formation of an airpocket in the upper part of the float-'pipe D, I prefer to connect the upper portion of .this pipe with the main discharge-pipe K2, by means of a small vent-pipe S, provided with a ballor other suitable check-valve s, that will allow the air to escape from the floatvpipe D, while preventing the backow of liquid from the discharge-pipe K2 into the iioat-pipe D.

In order to prevent the casing A being lifted by any accumulation of water on the outside thereof, I prefer to secure to the casing the angular band T, that will be embedded in the wall of the pit.

The great desideratumin apparatus of this characteris that the parts shall be'as simple, compact, and durable as possible, and one marked'advantage of my present invention is that it avoids the necessity of building any masonry pit and `brings the various parts in such relation that they occupy comparatively little space. By employing an inclosing casing for-the pumps and by connecting this casing to the liquid-receiving tank not only is the structure simplified and cheapened, but the space occupied by itis materially reduced, and the Whole apparatus can be conveniently shipped ready for immediate instalment.

It is manifest that changes in the precise details of construction above set out may be made without departure from the spirit of the invention. n n

S0 farV as Iam aware this invention presents log' the first instance of an apparatus of the char- A acter described in which there is a tank or reservoir for the' sewageconnectedto an inclosing casing wherein the pump mechanism is carried, the bottom of the tank or reservoir ex- IZO tending below the bottom of the inclosing casthe pumps are mounted is also avoided. The

float-pipe D, extending as it does above .the

top of the tank or reservoir B, becomes, in' effect, a part of the tank or reservoir and allows the liquid to rise suiiiciently high to permit priming of the centrifugal pumps.l

It is manifest that features of my invention may be advantageously employed whether aplurality of pumps be used or not, although I0 for obvious reasons it is preferred to use two pumps.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. An apparatus of the character described comprising an inclosing casing, apump within said casing, a liquid-tight tank or reservoir connected to said inclosing casing and extending below the bottom thereof, a pipe for admitting liquid to said tank or reservoir, suitable pipes leading from said tank or reservoir` pump to the outside comprising an inclosing casing, a pump Within said casi ng, a liquid-tighttank-or reservoir located below said casing and having an expanded annular portion connected to the boti tom of said casing, a pipe for admitting liquid to the tank or reservoir and suitable pipes leading from said tank or reservoir to the pump and from the pump to the outsideof the casing. 4. An apparatus of the character described,

anism within said casing, a liquid-tightv tank or reservoir having an expanded annular portion connected to the bottom of said casing and f provided with braces extending between said annular portion and or reservoir. g

v 5. An apparatus of the character described, comprising an inclosing casing, pump mechanism Within said casing, a liquid-tight tank or reservoir connected to said inclosing casing and extending beiow the bottom thereof,V a float pipe or extension leading upwardly from said tank or reservoir to a point above the pump mechanism, a float, suitable. means whereby said fioat controls the action of said `1 comprising an inclosing casing, pump mech-l the side wall of said tank pump mechanism and suitable pipes for the admission and discharge of liquid to and from` said tank or reservoir. Y

6. An apparatus of the character described, comprising an inclosing casing, pump mechanism within said casing., a liquid-tight tank or reservoir connected to said casing and extending below the bottom thereof, a iioat-pipe leading upwardly from the lower part of said tank or reservoir to a point above said pump mechanism, a float, suitable means whereby said float controls the action of said pump mechanism and suitable pipes for the admission and discharge of liquid to and from said tank or reservoir.

7 An apparatus of the character described, comprising an inclosing casing, pump mechanism Within said casing a liquid-tight tank or reservoir connected to said casing and extending below the bottom thereof, covers for said tank or reservoir and for said'casing and induction and float pipes extending between said covers and supporting the cover of said inclosing casing, a ioat, suitable means whereby said float controls the action of said pump mechanism and a suitable discharge-pi pe leading from the tank or reservoir.

8. An apparatus ofthe character described, comprising an inclosing casing, pump mechanism within said casing, a liquid-tight tank 9 0 orA reservoir connected to said casing and extending below the bottom thereof, said tank or reservoir being provided at its top with a port and With a valve for closing said port and suitable pipes for the admission and discharge '95 of liquid to and from said tank or reservoir.

9. An apparatusof the character described comprising an inclosing casing, a pump with.- in said casing, a liquid-tight tank or reservoir connected to saidl casing and extending below the bottom thereof, an induction-pipe leading through said casing to said tank and provided with a valve-seat and valve and suitablepipes leading from the tank or reservoir to the pump and fromthe pump to the outside of the casing. .105 10. An apparatus of the character described,

comprising an inclosing casing, pump mechanism-within said casing, a liquid-tight tank or reservoir connected to'said casing and extending below the bottom thereof, an'induc- IIbV tion-pipe leading through said casing to `said tank and ,provided with a valve-seat and with a vertically-movable valve, a valve-stemy leading from said valve through the top of the inclosing casing and means for operating said EDWARD YEOMANS. 4 m p Witnesses: A GEORGE P. F1sHER,'Jr., t L,

4 ALBERTA ADAMIGK.

`valve-stern.y i 

